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Would you have said the same if you did not know this was AI generated?

I have no clue

Nah, using these

Here is my original design... And the one my partner made using chatGPT... let's see what Tayda does with it :rolleyes:

Ok, so confirmation on what I showed on the table for C taper, which makes the graph look like this, exactly the opposite of what I'd love: Has anyone ever managed to simulate an "extra" log taper? I tried several combinations with different tapers and resistors in parallel but this just makes...

I am trying to find the best fit for a potentiometer within my circuit, but really, in simulation I only ever use A and B taper... I never really understood how the others work... Here are the graphs with both tapers; I am greedy and looking for a more precise transistion on the early course of...

Oops, correct I meant IRF7380 or else. Ok ok, makes sense I will try out :)

I may be out of my depth here but would it make sense to use an 8 Pins double N channel instead of a bulky CD4007? like an IRF7342? I see that the VSS of the CD4007 is connected to Vref but how does it matter in this circuit?

Those are the GT311 russian ones, datasheet is here, ChatGPT is always happy translating these. Got a bunch of the i series (the reverse N) about a decade ago for all NPN versions of oldies. Rarely found such high hFE for germanium NPNs (up to 500). Somehow they sell cheap as PNP, I believe...

Oh that is definitely possible, I just compared to the board on the build docs, which seems a bit different (C4 and C5 arrangement for example)

C7 is reversed, positive lug should be at the top. Check the polarity of the diodes as well, D1 is backwards. Diodes should be fine, type is ok. Check as well that you have contact between the third lug of the gain potentiometer, looks like a cold one :

Frenzel have heads for this, plus a few tonal options that are pretty decent, I myself have the Princeton Plexi 964 and it is a dream after owning a princeton for decades. Super Bassman Bluesbreaker Mini-Bassman 50 Retro Super Bassman 100

a replacement can be found for cheap here for the 1S188-FM : 1K188FM have a look at this plot to compare diodes. You will see quite a few close match for anything you look for, 1S188 and 1K188 measure the exact same, just a different name, same diode

Try another TL072, not changing the values of resistors that are as indicated in the bill of material.

I would try another pot, just for the sake of eliminating that

Is the potentiometer logarithmic or linear?

wow this is insane, I would just refuse the package altogether for that price. maximum I paid was about 20% in Germany and 10% cheaper for customs in Switzerland but 800 is insane. I'd contact DHL, there has to be a mistake..

C5 at 220n (with R8 = 2.7k) cuts the bass before clipping at 267.9376 Hz - that is the stock mostortion C5 at 47n (with R8 = 4.7k) cuts the bass before clipping at 720.4841 Hz - that is the stock tube screamer Play around with an RC high pass filter calculator (online example) to find what you...

Are you using a linear potentiometer or a logarithmic one?

I updated the plot, looks like you could swap with one of these C945 BJT, you can get 1000 on eBay for 10$. These work as well for the mojo MA85x diodes. If you get a chance to compare both or any others, it would be great to hear your thoughts.